Adult patients with incidental abnormal LFTs, in the absence of a previous history, or current symptoms/signs of liver disease were prospectively recruited from eight primary care practices in Birmingham. NAFLD was diagnosed as fatty liver on ultrasound, negative serological liver aetiology screen, and alcohol consumption ?0 and ?0 g/day in males and females, respectively. The NAFLD Fibrosis Score (NFS) was calculated to determine the presence or absence of advanced liver fibrosis in subjects identified with NAFLD.
Data from 1118 adult patients were analysed. The cause of abnormal LFTs was identified in 55 % (614/1118) of subjects, with NAFLD (26.4 % ; 295/1118) and alcohol excess (25.3 % ; 282/1118) accounting for the majority. A high NFS (>0.676) suggesting the presence of advanced liver fibrosis was found in 7.6 % of NAFLD subjects, whereas 57.2 % of NAFLD patients had a low NFS (<?.455) allowing advanced fibrosis to be confidently excluded.
NAFLD is the commonest cause of incidental LFT abnormalities in primary care (26.4 % ), of whom 7.6 % have advanced fibrosis as calculated by the NFS. This study is the first of its kind to highlight the burden of NAFLD in primary care and provide data on disease severity in this setting.